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Debian: DSA-5462-1 Critical Update: AMD Zen 2 Information Leak

Tavis Ormandy discovered that under specific microarchitectural circumstances, a vector register in AMD "Zen 2" CPUs may not be written to 0 correctly. This flaw allows an attacker to leak sensitive information across concurrent processes, hyper threads . - ------------------------------------------------------------------------- Debian Security Advisory DSA-5462-1 This email address is being protected from spambots. You need JavaScript enabled to view it. https://www.debian.org/security/ Salvatore Bonaccorso July 30, 2023 https://www.debian.org/security/faq - ------------------------------------------------------------------------- Package : linux CVE ID : CVE-2023-20593 Tavis Ormandy discovered that under specific microarchitectural circumstances, a vector register in AMD "Zen 2" CPUs may not be written to 0 correctly. This flaw allows an attacker to leak sensitive information across concurrent processes, hyper threads and virtualized guests. For details please refer to and . This issue can also be mitigated by a microcode update through the amd64-microcode package or a system firmware (BIOS/UEFI) update. However, the initial microcode release by AMD only provides updates for second generation EPYC CPUs. Various Ryzen CPUs are also affected, but no updates are available yet. For the stable distribution (bookworm), this problem has been fixed in version 6.1.38-2. We recommend that you upgrade your linux packages. For the detailed security status of linux please refer to its security tracker page at: https://security-tracker.debian.org/tracker/source-package/linux Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/ Mailing list: This email address is being protected from spambots. You need JavaScript enabled to view it. . The Debian Security Announcement DSA-5473-1 outlines an urgent patch that tackles potential data exposure vulnerabilities found in Intel Haswell processors.. Debian Security, AMD Zen 2,Information Leak, Linux Update, Microarchitectural Flaw. . Severity: Critical. LinuxSecurity.com Team

Jul 30, 2023 •Critical Debian